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    <title>Document</title>
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    <script>
        // 使用function* 声明一个generator状态机对象,
        function* generator(){
            // yield关键字用来定义一个个的状态
            yield console.log(1);
            yield console.log(2);
            yield console.log(3);
            yield console.log(4);
        }

        const p1 = generator();
        console.log(p1);
        p1.next();
        // 每次调用iterator对象上的next方法,可以执行一个yield后的状态
        p1.next();
        p1.next();

    </script>
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